Chain assembly



Dec. 9', 1930. A. F. KRAEMER 1,784,451

CHAIN ASSEMBLY Filed Juiy 12, 1929 f I INVENTOR "M714 @asf/.'a//ze/ "m www /g A TTORNEYS.

Patented Dec. 9, 1930 I'FJNITEII STATES vPATENfr- OFFICE AUGUST F. KRAEMER, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO'LOUIS" STERN COMPANY, F PROVIDENCE, RHODE ISLAND,'A-COEPORATION OF RHODE ISLAND CHAIN ASSEMBLY Application led July 12,

This invention relates to an improved construction of bracelet or chain, formed of a plurality of links rpivotally connected together, and one of the objects of this inveni tion is to connect together the links of the series with a pivot pin and to provide formations on the pin and on the links which l invention consists of certain novel features of construction, as will be more fully de-y scribed, and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. lis a front view showing a series of links connected together.

Fig. 2 is a rear view of a series of links of the bracelet or chain pivotally connected together.

Fig. 3 is an edge view of the series of links shown in Figs. 1 and 2.

Fig. 4 is an enlarged sectional edge view showing a tongue as formed from the endwall of each link and engaging a recess in the pivot pin.

Fig. 5 isa sectional view on line 5 5 of Fig. 4 showing the pivot pin as recessed intermediate its ends and the resilient tongue of the link embracing this recessed portion of the pivot pin.

Fig. 6 is a perspective view of the under side of a box link having portions partly7 broken away to better show the spring tongue formed in the end wall of the link.

Fig. 7 shows the pivot pin in elevation as .45 having its middle portion reduced in diameter.

Fig. 8 shows a modification in which the pivot pin is shown as being flattened on one side intermediate its ends.

Fig. 9 is another modification partly in section showing the pivot pin as having a 1929..- sevriai No. 377,738.

headon one end' and a nut threaded on its opposite end, and being embraced and guided at its middle portion by thev tongue formed in the end wall of the link.

It is found in the'construction of link 'i chains orbracelets of advantage to employ a pivot pin for connecting together the ends of the links and lso construct the parts that when thepin is forced into position it will be automatically retained without being obliged to apply additional fastenings to the pivot in order to maintain it in position, and to accomplishthis in asimple andeffective way, I 'have vreduced the pivot" pin intermediate its ends and I havejformed ay resilient tongue yfrom the end wall of the link to enter the recess the pin and rmlyretain the pin inv its pivoting for operating 'position against beinginadvertently removed therefrom. ,If it is desired thatthe pin jpbe 'perf manently secured in position, it is vonly nec'-v essary toform square shoulders on theend walls of its reduced portionwhich willybe engaged by theedges of thetongue andfposh tively prevent the removal fof the pin after having been positioned to pivotally` connect thelinks together, and the following. is

detailed description ofthe present embodiment ofvmy inventionandshowing oneconf struction of links. and pivot pin by means of. j

which these advantageous resultsI may be accomplished.- y, j f A With-reference tofrtheV drawings, 10 designates'the .links ofthe-bracelet or chain which are pivotally connectedgtogetherin series.

Thejlinks `herein shown are constructed in box shapeeachhaving a. top wall 11, side walls 9, and an end .wall` 1,3. The sidewalls at one end ofthe link, being arranged yto extend beyond the top wall, fo'rmears 12, pierced at 13. to receive :the ends ofthe pivot pin 14;. The wall 1,3, at the opposite end 'of the link is folded downwardly forming a square shoulder l5, andthen `in a semi-circle as at 161with its end portion 17 extending along beneath the' link'. The ylower edges of the side walls are eachy provided with inturned flanges 18 which overlie the inturnedend 17 ofthe wall ,13 tofretain this folded end wall in position. l

f 2o l Y y Theends123fofth's pivotjpin after having 2 i Y l 1,784,451

I have slit this'end Wall 13V as at 19, forming a'resilient tongue 20 therein which isV tongue 20 toride up on thisy inclined portionA ysoV folded over and inwardly into loop shape forming a resilient or yielding tongue or m'ember for the purpose of guiding the enteringr pin and retaining it when inserted.V

helpiyot pinliv-is preferably formed with a recessp'rtionll intermediate itsends and when it is desired that this pivot pin shall beremoved lfrom operating position as af i. jointpinin they links, the end Walls 22 of this recessl yare slightly beveled so that a strong neath said bottom flanges said endwall being slit to form a 'resilient tongue-with its free end bentinwkardly in loop form to grip the pivotpininserted therein. f

In testimony whereof I ailx my signature;

AUGUSTE KRAEMER. v

endways pressure on the pin Will causeth-- permitting the pin to be removedffbut if kit' should be desired to lookthis pinin position,

they @iid walls @f thisy recesswin remain SquireA i Whhiwillslgeg the edges 0f, the tongue andso secure thepn permanently in posi-p` tion againsty 1erilvsfays removal.

*thus Pinelli connecting these f linkse-1 f these ears-12 fromlthe pin'ieiien through the l *Y ears be'ispreadslightlyfromexoessive g'ing' together linksf "a 'chain or p yextremely simple and 'practiel inasmoh as' 'f being applied tothe Chain.

" "In Ote" Y f aheadi25 onone-'en'd of the pinl 27 and a nut 26" may 'be threaded on the 'opposite o of er instances; if Ldesired I form the pin to retain the samefin (position,asj

- llistrated in Fig'.'r9.""

. Myfimproved'means of pivotall-Yoonnect-` the -pinis retalnedautomatically Whenposlf tionedA in the links'.v 5 lThis Constructionl 'is' also eiective' inlitsjoperationand' byfit's use the oostfof construction is `materially redudff racveleifl 4isv v 1. In af chain structure' a series of-' box. 'y y' having 'top Viend and' side we ls5 'bottoni fm'e'rn'- bemf extending inwardly from 1 lsind sieg walls,^and said vendw'a-ll `being folded ba'ok Vin loopform to extend' 4beneath saidbbttm 4 pmf Y membersl andv shaped" to pr'ovi'de'ia' bearing' i for the connecting pivot pin and aresiliet tongue formedf'romhthe stock 'of saidfenfd re'sist'vitsf endways movement.

2. A ychainstructure'for'fn'red oflla of box'links pivoted together, said links'having topendnnd` side "Walls,v bottom flanges" eX` 4 tending inwardlyy from said rvslide' Walls',- an

-waufand shaped @engage nepi-yet prin f.V i f j Y extending portion aerith@ and *oft-ap" wall f being-vfoldedbaikck' in loop'fshapeto forni said endl'Vv` wail withy f itsL extremityvv xtennringn'ii;

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